Line-lock attachment for type-writing machines.



PATENTED JULY 5, 1904.

2 SHEETS-SHEET 1.

No. 764,070.v

W. A PAEKER. LINE LCCK ATTACHMENT TCE TYPE WRITING MACHINES.

APPLICATION FILED AUG. 25, 1903.

N0 MODEL.

PATENTED JULY 5, 1904.

v W. A. PARKER. LINE LoGK ATTACHMENT EOE TYPE WRITING MACHINES.

APPLICATION FILED AUG. 25, 1903.

N0 MODEL.

. [NVENT WMMMI'M WIM/155%- 7/"Ff @.74 o

Patented July 5, 1904.

PATENT EETCE.

WILLIAM A. PARKER, OF VACG, TEXAS.

LINE-LOCK ATTACHMENT FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 764,070, dated July 5, 1904.

Application filed August 25, 1903. Serial No. 170,723. (No model.)

To all 11171/0717/ it muy concern:

Be it known that l, TVILLIAM A. PARKER, a citizen of the United States, residing at Waco, in the county of McLennan and State of Texas, have invented certain new and useful Improvements in Line-Lock Attachments for Type-Triting Machines, of which the following is a specification.

This invention relates to type-writing machines, and has special reference to that type of attachments which are designed to lock the entire type and key action when the carriage has reached the end of the line being printed.

To' this end the invention contemplates a line-lock attachment having special utility in connection with the Oliver type-Writer and capable of working in conjunction with the parts already in use on that machine. One of the objects in this connection is to provide a line-lock capable of being attached to the machine without altering or changing any of the parts thereof, with the exception of'filing off the right-hand marginal stop seven-eighths of one space.

The special purpose of the invention is to prevent the printing of one letter over another by eii'ecting a locking of the key-levers when the carriage of the machine reaches the end of the line, while at the same time permitting of the release of the type-action from the lock, whereby the operator can printl additional letters, such as may be necessary to complete a word, or as many letters or words as the remaining space on that line of the paper will hold.

A further object is to provide a line-lock device wherein no strain is imposed on the key-levers or other mechanism and which also does not affect the space-key, so that it is possible to divide words at the end of the line after the line-lock has been brought into play.

l/Vith these and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

The essential features of the invention involved in the construction provided for carrying out the special objects above indicated are necessarily susceptible to modification without departing from the scope thereof; but the preferred embodiment of the invention is shown in the accompanying drawings, in which- Figure l is a perspective view of the complete line-lock device shown in its applied position to an Oliver type-writing' machine, the latter being shown in dotted lines. Fig. 2 is a fragmentary sectional view of the typewriting machine, showing the several parts of the line-lock attachment inoperative relation thereto. Fig. 3 is a horizontal sectional view on the line 3 3 of Fig. 2. Fig. 4L is a perspective view of the operating parts of the linelock device shown separated. Fig. 5 is a detail elevation from the position indicated by the line 5 5 on Fig. 2, illustrating the normal relation between the locking-comb and the usual guiding-comb for the key-levers, whereby the same are permitted to freely move in operating the type-action. Fig. 6 is a similar elevation showing the shiftable comb in its locking position to prevent any of the keys of the type-action from being depressed.

Like reference characters designate corresponding parts in the several figures of the drawings.

As indicated, the line-lock attachment contemplated by the present inventionis specially1 designed for the Oliver type-writer; but in applying the attachment to the ,machine no change is required in any of the working parts of the latter, excepting in thel right-hand marginal stop, (designated by the numeral l in the drawings.) This stop is mounted in the ordinary manner upon the usual carriage 2; but for the purposes of the present invention this stop is filed off or shortened exactly seveneighths of one space. The carriageis operated by the usual escapement mechanism, which includesthe spacing-pinion 3, cooperating with the space or escapement rack 4, carried by the carriage, and the arbor or shaft for the s pacing-,pinion is arranged in its usual upright position within the central Liortion of the machine in rear of the keyboard and having a bearing adjacent to the pinion in the fixed frame member or boxing 5, which is utilized in the present invention as apoint of support for certain parts of the line-lock attachment.

The line-lock attachment includes' as one of the elements thereof a supporting-bracket 6,V preferably of an L form and having its upright member 7 fastened tothe front side of the fixed frame member 5 through the medium of the screw or equivalent fastenings 8, and to the upper side of said bracket is pivotally connected a horizontally-swinging adjustinglever 9. This adjusting-lever is of an angled formation and is pivotally supported intermediate its ends upon the said bracket, as at 10. By reason of its angled formation the saidlcver 9`is provided with atront forwardly'-V dipped` member 1111,l extending beneath the key-levers K and' having its frontextremity arranged to engage against thearm projection 1Q', carried by ahorizontallyI orlaterally shittable locking-comb 13, arranged in'matching' relation to and at one side' of the stationary guiding-comb 14;, occupying its usualposition in the front of the machine-frameandi Whose slots 15 constitute guides for the key-levers K in theirrising-anchfaliingmovement. rEhe stationary guiding-comble is usually of an angular construction in cross-section, andy the sl'iiftableV locking-combis similarly shapedi,x so

as tofit Within' the angleof the comb 1ML', as

plainly shown in' Fig. 2, said guiding-#comb thereby forming a slid'eway tor theleckingcomb. rllhis locking-comb' preferably held toits sliding movement at therear side of the guiding-comb by means ot the retaining screw or device'.1'6, projecting througli a* slot 17', formed in the base-flange 18 ot the lockingcomb and' secured inthe corresponding'fiange of the guiding-combi Also the' shitt'a'bl'e or slidable locking-comb has suitablyl connected thereto on'eendofv a retractin'g-spring 18, the other end of which is fastened to afixed point of attachment, as at 19; so that the same will! normally exert a retracting stress upon the comb 1&3 in order toholdl the slots thereof in register with those of the' guidingcomb;- vvhcreby the key-levers are perfectly free' to be operated. However, it isto be observed that the fingers 19' of the l'ocl'ting-comb` are* shorter than those of the' guiding-comb, so that When the' former4-that is, thel lockingcomb-is adjusted totheposition shownliniFi'g. 6 the upper ends of the fingers1'9pass beneathl all of the key-levers, and thus positively loch the same against movement and preventing the operation of the type-action.

At the end opposite its operative conneetion with the locking-comb the horizon-tallyswinging adjusting-lever 9has-mountedthere on a pivotalA tripping-detent Q0; The' detent l 2O projects laterally' from the rear end of the adjustingslever and lies inI approximate parallelism to the escapement-rack 4. At one end the tripping-detent has a pl-votail mounting,

as at 21, upon the rear extremity of the lever 9, and at its other end the said detent is provided With a downwardly-deflected curved .stop-linger 22, normally held projected into a pathof interference with the right-hand marginal stop 1, so that when the carriage reaches'the end of theline the said stop will come in contact with the finger 22. The lat- )ter is normally held projected into said path of interference through the medium of a holdling-spring 23, connected at one end to the detent at one side of the pivot and at its other end connected to the adjusting-lever. The detent is prevented from being moved to an extreme position by a stop-lug 211, projected from one side oftheheelof the detent and engaging' againstl the adjustingllexcr.

lit Wilt be' obvious tlfia't when the marginal stepI 1i is' carried against thestepsnger'ef the its pivot lit),V thereby causing the locking- ;comb 13`t`o be shit-ted laterally tothe locked position, (shown in Fig. 6,')1 thus locking the 1 Gntirekey andi typev actiontrom' operation. If l it is desired' to` addi a few'letters to com-plete'a l word or to wri`te an: additional? Word,4 the stop- 'finger of the' detent isthrown forwardly out l of engagement with the marginaflstop through i the medium et thel marginal rel'easmhey 25.

Themarginal release-'key- Q5 occupies its 3 usual position within theV central partI of the ma'chi'ne'i'iI rea-r of the keyboaird This kfey vis in the formV of a* belli-crank lever pivotally mountedgas at Q6; uporr the framework and ha'fving. the' upstand'ing stoparmi' 27.1,. which f normally lies in5 .thepathfof the marginali-stop and ordinarily cooperates therewitlr ini the Ol'iver type-Writing machines new upon the market. In the present l'invention th'e said amm` 27 performsithe additional function! of a .releasing member, which moves against the llower point or nose of thel stopLiinger 22', so i` that Whenlthe said key Qis'depressedl thede- :tent is moved forwardly out of the path: ott the marginal stopandx the retractingfspring 181 is permitted to retract the locking-comb j into register withl t1i1eguidng-comh; thereby relea'sing the type-action` for the purpose indicated.

In further explanation of the action of the line-lock, assuming that two short Words, 'such as We are, are being printed and the locking action: takes place after printing the Word H we, ordinarily the operator will? involuntarily strike the space-key of the machine before` attempting to Write' the Word are,. and' after touching the space-key Will find the keyboard locked on attempting to write the next letter. Then. by pressing the imarginal release-l` ey the' key-leversare rei leased and? the' carriage advances beyond the `space that divides the words, thus leaving the two Words printed with a proper separa i tion. This is rendered possible hy the short `detent the adjustingllevei" 9" isl oscillated on IOO IIO

ening of the marginal stop seven-eighths of one space, so that when the letter that throws in the lock is printed the carriage moves up just seven-eighths of one space and is arrested until the release-key is operated, whereupon the carriage moves up the remaining oneeighth of the space. However, if the spacekey is struck before the lock is released the movable dog will rise up behind and fall over in front of the corresponding tooth of the escapement-wheel, so that the carriage will then move one and one-,eighth spaces when the release-key is pressed, leaving the divisionspace between the two words.

From the foregoing' it is thought that the construction, operation, and many advantages of the herein-described line-lock attachment will be readily apparent without further description, and it will `be understood that changes in the form, proportion, and the mi-v nor details of construction may be resorted to without departing' from the spirit or sacrificing any of the advantages of the invention.

Having thus described, my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In 4a line-lock attachment, the combination with the key-levers and the movable element bearing the marginal stop, of a'locking device operating beneath the keyboard and arranged to be moved into and out of interference with relation to the keylevers, a swinging adjustinglever supported within the machine-frame and having a connection at one end with said locking device, a movable detent carried by the lever and coperating with the marginal stop, and a separate release device for said detent.

2. In a line-lock attachment, the combination with the key-levers, the guiding-comb swinging adjusting-lever supported within the machine-frame and operatively related to the comb, a spring-pressed tripping-detent pivotally mounted on the rear end of the adjusting-lever and having a member arranged to be engaged by the stop, and a release device coperating with said detent.

4. In a line-lock attachment, the combination with the key-levers, the machine element carrying the marginal stop, and the releasekey having a member arranged in the path of the marginal stop, of a shiftable locking-comb operating beneath the key-levers, a pivotallysupported swinging adjusting-lever operatively related to the comb, and a springpressed tripping-detent pivotally mounted on the rear end of the adjusting-lever and having a member arranged to be engaged by the Stop and also by said release-key.

In testimony whereof I affix my signature in presence of two'witnesses.

WILLIAM A. PARKER. Witnesses W. H. KENDALL, NORMAN H. SMITH. 

